[lwip-users] Question about Lwip Porting to 7x256 with Dm9161 PHY

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zhou yi

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Jul 18, 2008, 8:02:38 AM7/18/08

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Dear all:

I use At91sam7x256-ek board to port lwip, which use Dm9161 PHY, IDE tools is IAR 4.33. If I only initialize the LwIP stack, I can ping the board. This maybe mean the lwip porting is ok, in this porting project I only call the lwip functions: sys_init(), mem_init(), memp_init(), pbuf_init(), netif_init(), tcpip_init(), IP4_ADDR(), netif_add(), netif_set_default(), netif_set_up().

But when I do more job like writting a HTTP daemon like belows:

struct netconn *__pstConn, *__pstNewConn;
struct netbuf *__pstNetbuf;

uprintf("\n\rStart Httpd Daemon.\r\n");
__pstConn = netconn_new(NETCONN_TCP);
if (NULL == __pstConn)
{
  uprintf("netconn_new NETCONN_TCP failed\r\n");
  OSTaskDel(OS_PRIO_SELF);
  return;
}
uprintf("Start bind to 80 port\r\n");
netconn_bind(__pstConn, NULL, 80);
uprintf("Start listening\r\n");
netconn_listen(__pstConn);

while(TRUE)
{
  __pstNewConn = netconn_accept(__pstConn);

  if(__pstNewConn != NULL)
  {
   __pstNetbuf = netconn_recv(__pstNewConn);
   if(__pstNetbuf != NULL)
   {
    netconn_write(__pstNewConn, "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n", 44, NETCONN_COPY);
    netconn_write(__pstNewConn, "<body><h1>This is LWIP TCP Test！</h1></body>", 40, NETCONN_COPY);

    netbuf_delete(__pstNetbuf);
   }

   netconn_close(__pstNewConn);
   while(netconn_delete(__pstNewConn) != ERR_OK)
    OSTimeDlyHMSM(0, 0, 1, 0);
  }
}
}
after recompiling and downloading to board, not only ping is not available, but also can not visit the web page. After adding debug information, I find when I call netconn_new() function, then turn to function sys_mbox_fetch() function, and then call sys_arch_timeouts() function which is implemented in sys_arch.c and this time board never returned.